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Best LangSmith alternatives in 2026

LangSmith is debug, test and monitor LLM apps and agents. If it isn't the right fit, these 10 ai agents tools launched on AskableHQ solve similar problems — ranked by community votes.

  1. B
    BraintrustAdded by AskableHQ

    Evaluate and improve AI products

    AI AgentsFreemium0 💬90
  2. A
    Arize PhoenixAdded by AskableHQ

    Open-source AI observability and evaluation

    AI AgentsOpen Source0 💬100
  3. P
    PortkeyAdded by AskableHQ

    AI gateway for production apps

    AI AgentsFreemium0 💬95
  4. H
    HumanloopAdded by AskableHQ

    LLM evals and prompt management

    AI AgentsPaid0 💬0
  5. W
    Weights & Biases WeaveAdded by AskableHQ

    Track and evaluate LLM applications

    AI AgentsFreemium0 💬90
  6. P
    PromptfooAdded by AskableHQ

    Test and red-team LLM apps

    AI AgentsOpen Source0 💬90
  7. A
    AgentaAdded by AskableHQ

    Open-source LLMOps platform

    AI AgentsOpen Source0 💬90
  8. H
    HeliconeAdded by AskableHQ

    Open-source LLM observability and gateway

    AI AgentsOpen Source0 💬86
  9. L
    LangfuseAdded by AskableHQ

    Open-source LLM engineering platform

    AI AgentsOpen Source0 💬76
  10. A
    AgentOpsAdded by AskableHQ

    Observability and debugging for AI agents

    AI AgentsFreemium0 💬48

Head-to-head comparisons